Bone-inspired steel cracks less under pressure
Variable pockets may make the building material more resilient
![steel bridge](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2017/04/032017_lh_steelbridge_main_free.jpg?fit=860%2C460&ssl=1)
STURDY STEEL Steel that mimics bone could one day help make bridges and other structures less prone to crack.
Chris Combe/Flickr (CC BY 2.0)